Class selectors in rightmost compound selector should cause LocalStyleChange even if we cannot use invalidation sets. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS internals.updateStyleAndReturnAffectedElementCount() is 1 PASS getComputedStyle(elm, null).backgroundColor is green PASS internals.updateStyleAndReturnAffectedElementCount() is 1 PASS getComputedStyle(elm, null).backgroundColor is green PASS internals.updateStyleAndReturnAffectedElementCount() is 1 PASS getComputedStyle(elm, null).backgroundColor is green PASS successfullyParsed is true TEST COMPLETE